Improvement in fencing-strips



UNITED STATESPATENI' Onnron.

THOMAS V. ALLIS, OF NEW YORK, N. Y.

IMPROVEMENT IN FENCING-STRIPS.

Specification forming part of Letters Patent No. 209,790, dated November12, 1878 application filed August 26, 1878.

To all whom it may concern:

Be it known that I, THOMAS V. ALLIs, of New York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Barb-Wire for Fences and Process for Making Same; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it-pertains to make and use it, reference being had to theaccompanying drawings, which form part of this specification.

My invention relates to an improvement in barbed fences, the objectbeing to provide a barbed bar for fences of simple and durableconstruction and of small initial cost; and to that end my inventionconsists in a barbed barforfences composed of a rib having thin flatparallel-sided barbs formed on one edge of the rib, the base portions ofthe several barbs being connected together by a continuous narrow finwhich projects from the rib.

In the accompanying drawings, Figure 1 is a transverse section of theblank from which the barbed bars are formed. Fig. 2 is a plan View ofthe blank, illustrating one method of forming the barbs. Fig. 3 is aplanview of a blank, showing another method of forming the barbs. Fig. 4 isa plan view of the barbed bar before it is twisted. Fig. 5 is a view, inperspective, of the completed bar. Fig. 6 is a transverse section of thefinished article as shown in Fig. 5.

A represents a blank in cross-section, consisting of the ribs B andconnecting-web O. This form of blank is formed by rolling, as an equalpressure is exerted on opposite sides of the same. The ribs B arepreferably of diamond shape or form, for the reason that such formenables the rolls to hold the blank firmly and prevent any lateraldisplacement of the same in the rolls. Also, the diamond-shaped ribimparts maximum stiffness to the completed bar as its transverse sectionis increased in width without adding to the weight or cost of the bar.The blanks are severed by a longitudinal cut,a, produced by stamping orby revolving shears or cutters, the barbs b c beingformed at a singleoperation on the inner and adjacent edges of the ribs B.

It will be observed that the connecting-web O is of a width but slightlyin excess of the desired length of barbs, and by severing the web 0 inthe manner illustrated in Fig. 2 but little stock is wasted in themanufacture of the barbed bars.

It has been found impracticable to produce barbed bars from blankshaving aweb on one side only of the blank, owing to the difference inthe work to which the rolls are subjected and the additional difficultyof holding the blanks in the guidesthat is to say, by rolling a'thin baror blank with one edge thicker than the other the bar will curl andtwist as it leaves the rolls. Were it possible to roll such bars thinenough and long enough to be commercially practicable for fences, theywould warp when cooled, owing to the surplus metal on one edge thereof,thereby rendering it impossible to punch or shear the barbs from the finor web upon the edge of the rib unless the barb is previouslystraightened, which latter operation necessarily disturbs and weakensthe fibers of the metal.

In my improved barbed bar the base portions of the several barbs arejoined together by a narrow continuous fin that projects from the rib B.This narrow fin subserves several important functions: First, it enablesthe several barbs to be formed without severing the skin of the rib B,and hence the main strengthening-rib is kept intact, and the metal isnot oxidized and weakened, as would be the case if the skin of the ribwere severed to form the barbs second, the narrow fin imparts additionalsectional area to the rib B, and thus assists quite materially instiffening the same; third, the narrow fin adds to the width of the bar,and thereby enables it to be more readily seen by the stock.

After the barbs have been formed in the manner stated the bar is twistedand the single row of barbs disposed spirally about the rib.

Instead of cutting the barbs from the blank in the manner shown in'Fig.2, they may be formed as shown in Fig. 3 but the former plan ispreferable, as involving a less waste of stock.

The process of manufacturing my improved barbed bar is herein describedto enable oth- A barbed bar for fences, consisting of a rib oftriangular or equivalent form, having a single row of triangular barbswith parallel sides formed on one edge of the rib, the base portions ofthe several barbs connected together by a continuous fin which projectsfrom the rib, substantial iy as set forth.

In testimony that I claim the foregoing I have hereunto set my hand.

THOMAS V. ALLIS.

Witnesses:

I. W. BRIGHT,

l). MCGLEARY.

